Magneto



. F. H. SCHRYER.

rfnwlso.` APPLICATION FILED SEPT 25,1919 y 1,385,720. Patented July 26, 1921.

' y 2 SHEETS-SHEET 1.

FRANK I-I. SCHRYR, OF WAUWATOSA, WISCONSIN.

MAGNETO.

Application filed September 25, 1919.

To all whom t may concern.'

Be it known that I, FRANK H. SGHRYER,

. a citizenofthc United States, and resident CTI of IVauwatosa, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Magnetos; and I do hereby declare that the following is a full, clear, and exact descrip tion thereof.

AMy invention relates to new and useful improvements in electricity producing devices for use in connectonwith the ignition systems of internal combustion engines.

In magnetos used in connection with make-and-break systems of ignition, it has heretofore been more or less diiiicult to overcome lag and to procure a break at the moment when theelectro motive force is the greatest. It is therefore the primary object of this invention to provide a magneto of the oscillatory type wherein means is provided for overcoming these diiiiculties and otherwise increasing the eficiency of electric generators for ignition purposes. In this connection the break is procured by the direct action of the Aarmature or `con ductor carrying member itself.

An additional object is to provide an arrangement of parts which will be very compact, this being also `occasioned vby the relatively few number of such parts, whereby the magneto will require little space on the engine with which it is used and will be eX- tremely easy to mount and to repair.

A further object is to present a magneto of this character having a simple and novel means for vadvancing and retarding the time of spark. Y

With these general objects in view and others which will become apparent as the description proceeds, the invention resides in certain novel features of construction,

combination and arrangement of parts which will be hereinafter more particularly described and claimed. f

In the accompanying drawings:

Figure 1 represents a vertical longitudinal sectional view taken substantially on the plane of the line 1-1 of Fig. 2.

Fig. 2 is a plan view of the parts shown in Fig. 1.

Fig. 3 is a vertical transverse the lineS-Sv of Fig. 1, and

Fig. tis an end View of the device as seen from the breaker or spark gap end.

Referring now more particularly jto the section on Specification of Letters Patent.

with a stationary breakerpoint Patented July 26, 1921. Serial No. 326,231.

t are mounted between the arms 1 and 2 of a substantiallyr U-shaped ,frame 3, the arm 2 thereof having bolt aperportion 5 having stationary and movable electrodes 6 and 7 respectively mounted therein and designed to be inserted through the plug opening of an engine cylinder.

The arms 1 and 2 and the plug portion 5 are provided with alined bearing openings, that in the first mentioned arm being designated by the numeral 8 and that in the latter partsby the numeral shaft 10, one end of which is formed into the electrode 7, is journaled in said alined openings 8 .and 9. The electrode end 7 of the shaft 10 is provided with'a head 11 which bears against theV inner'end V'of the plug. portion 5 and carries ak laterally eX- tending arm 12 having a breaker point 13 thereon. This kbreaker point cooperates end of the stationary electrode 6, the portion 'of the same' which is within said cylindrical plug 5 being completely insulated therefrom. The end ofthe electrode 6 opposite to that carrying the breaker point 14 is provided with means for attaching a conductor thereto as indicated at 15.

The opposite end ofthe shaft 10, or that part Vwhich extends outwardly of the arm 1 is provided with a pin 16 and a coil spring 17.. The spring surrounds the shaft and has one end lsecured to the arm 1 and the other end engages the pin 16. This spring being of an eXpansile nature, the head 11 will be continuously urged into engagement with the end of the cylindrical plug 5, while the shaft 10 upon rotation in one direction will be automatically returned to initial position when released.

The shaft 10 forms a support and 2 bearing surface forV a sleeve 18, the intermediate portion of which has an armature or conductorv carrying' member 19 of conventional form mounted thereon." As is customary in devices of this character this armature includes a winding of insulated wire, one end of which is grounded to the fsleeve 18`while 'the oppositel end is fixed to a slip ring or equivalent pa1't20k.y

ges

9. A supporting i l14 on the 'l A part 20. Ther field'element of this l as is usual in ignition magnetos consists of one or more 'permanent horse-shoe magnets 25, the legs of which straddle the housing, and consequently the armature 19, and are secured to the former.

Normally the 'housing 25 are stationary, the lines of force set up by the latter being cut by the conductor of the armature when the same is oscillated. Movement ofthe armature in one direction is procured by a push rod 26 suitably actuated by the engine, and a finger 27 carried by a collar or other sleeve 28 fixed to and surrounding a portion of the sleeve 18 disposed externally of the housing 21 and located between the arm. 2 and the adjacent end of the latter. The sleeve 28 also has a pair of diametrically extending rocker arms 29 projecting therefrom at right angles to its axis, and when the armature is inactive and stationary these rocker arms 29 extend in the direction of and lie in the same plane as spring arms 30. These latter arms 30 are formed integrally with the cover plate of one end of the housing 21.

The end of each of the rocker and spring arms has a pin 31 projecting therefrom to receive the attaching ends of return springs 32. One of these springs is secured to each pair, of rocker and spring arms as most clearly shown in Figs. 2 and 3. Also from 21 and the magnets i Y the latter figure it will be appreciated that 'armature' and parts carrying asthe push rod moves toward the finger 27 it rwill cause the clockwiser rotation of the sleeves 28 and 18 together with the armature 19 until said finger has been shifted to such an extent that the contacting end of the push rod rides thereover, thereupon the springs 30, which have been placed under tension by the disalinement of the rocker and spring arms, 4will contract and quickly snap the the same back to initial position. v

One end of the other sleeve 28 is provided with a clutch face 33, and a clutch 34 is keyed to the shaft 10 for coperation therewith. The cam action exerted by the clutch face on the clutch element 34 causes a slight rotation of the 'shaft 10, and the electrode 8 vwith aresult that the breaker points 13 and 14 areA separated.

Although the housing 21 land the permanentv magnets 25 are normally stationary, they may be adjusted to various positions on the sleeve 18 and locked in such positions. This is carried out by making the bight ortion of the frame 3 arcuate as shown in igs. 3 and 4 and providing the same with a transversely extending slot 35 through which a stem 36 extends. This stem is in the form of a threaded rod carried by the bottom of the housing 21 and has a nut 37 for engagement with the outer surface of said arcuate portion of the frame 3. By suchan arrangement an advance or retard of the spark may be readily procured. Upon such partialrotation of the housing and magnets, proper relationship betweenV the clutch face 33 and the clutch arm 34 is retained by having the slot 35V disposed at an angle, other than a right angle, to the plane of the longitudinal axis of the shaft 10 (see Fig. 2).

The operation of the invention is briefly as follows: Assuming that the device khas been mounted upon` an internal combustion engine and the conductor connectors 15 and 23 electrically united, movement of the push rod 26 will relatively slowly revolve the armature 19 in a clockwise direction as seen from Figs. 3 and 4, this movement being continued until the ends of the push rod 26 and finger 27 disengage. Immediately disengagement takes place the springs 32 come into play armature in a counter-clockwise direction,

and very quickly rotate the the force of these springs being such as to The clutch parts 33 and 34 are so arranged with respect-to each other that they will engage and rock the shaft 10 upon the overthrow of the armature past its normal for. initial position. A spark of maximum in-k tensity is thus obtained.

l claim: 4' f 1. ln an electric generator, a frame, a rock sha-ft mounted in the frame, a field element, a conductor carrying element loosely mounted on said shaft, means for oscillating said conductor carrying element, a stationary electrode, a Ymovable electrode carried by the shaft and normally engaged with the stationary electrode, coperating clutch members on the shaft and conductor carrytion.

2. In an electric generator, a supporting shaft, a field element mounted on said shaft, a conductor carrying element loosely disposed on the shaft Within the field element, means for oscillating the conductor carrying element, means for collecting the induced current from the conductor carrying element, and means for shiftin ments longitudinally of the sha revolubly moving the field element on the shaft independently of the conductor carrying element.

3. In an electric generator, a supporting shaft, a field element support on the shaft, a field element carried by the support, a conductor carrying element oscillatoril mounted on the shaft Within the field element, means for oscillating the conductor carrying element, means for collecting the induced current from the conductor carrying element, cooperating clutch members on the shaft and conductor carrying element, and means for shifting the field element support revolubly about the shaft and longitudinally thereof.

4. In an electric generator, a relatively the ele. t and forV stationary frame, a rock shaft journaled in the frame, a movable electrode formed on the shaft, a stationary electrode carried by the frame and normally engaged by the other electrode, a field element support on the shaft, a field element disposed on the support, a conductor carrying element oscillatorily mounted on the shaft Within the field element, means for oscillating the conductor carrying' element, a clutch member carried by the conductor carrying element, a cooperating clutch member on the shaft, a spark adjusting member extending from the field element support, said frame having a slot, the plane of the axis lof which extends at an angle other than at right angles to the plane of the longitudinal axis of the shaft, receiving the spark adjusting member, and means for clampingr the spark adjusting member to the frame.`

In testimony that I claim the foregoing I have hereunto set my hand at VauWatosa, in the county of Milwaukee and State of Visconsin. l

FRANK H. SCHRYER. 

